The parts of machinery



' E. S. PIERCE. DEVICE FOR CONNECTING THE PARTS OF MACHINERY.

Patented Apr. 18, 1869.

'00 d ui @tifira ELIJAH S. PIERCE, OF HARTFORD, CONNECTICUT, ASSIGN'ORTO NATIONAL SCREW COMPANY, OF SAME'PLACE.

Letters Patent N 0. 88,902, dated April 13,1869.

The Schedule referred to in these Letters Patent and. making pa rt'ofthe same.

Like letters in the figures indicate the same parts. 1

Figure 1 shows a front view or elevation of my improved connection,

Figure 2 shows a top View of the same.

My invention consists in preventing the rupture of any of theworking-parts of -a machine, when. it becomes clogged or suddenlystopped from any cause, by

the introduction of a breaking-piece, somewhat weaker than any-of theworking-parts, of such a form and.

strength that it is sufficient to carry and transmit all the forcenecessary to conveymotion to the parts with which it is connected, butwhich will be ruptured by.

any strain that would damage the machine.

A and B are intended to represent sliding bars, moving through the frameD E, or any similar workingparts of a machine. I

O is the breaking connecting-mechanism, which, in the drawings, issimply a hexagonal cast-iron band, which will be broken by a forcetending to compress or extend it in the direction of the bars A and B.

This breaking-piece is attached to the bars A and B by pins a a, or somesimple contrivance that admits of a new piece being easily replaced whenone is broken.

I do not limit myself to the peculiar form of breaking-piece shown, asit may be made of a variety of iorni's'ithat will answer the samepurpose, as, for instance,"ja 'quare, held by its corners, or a straightbar, attached b'ydts ends to the bar A, and by its middle to the barB,-.'i n.;such a manner that it will be broken, across by a strain thatwould rupture it.

The advantage of my invention is, that, by its use, any undue strain ona machine, from whatever cause, is made to rupture an unimportant part,that can be easily replaced, instead of disabling the machine, as wouldbe the case when the rupture occurs in some important part.

The improved connection serves as a safety-valve, to enable the forceapplied to a machine to continue to move certain parts while others arebrought suddenly' to a stop, and prevents the inertia of the movingparts breaking some important part of the machinery, as is usually thecase when machines are suddenly stopped by becoming clogged ordisarranged.

Claim.

What I claim as my invention, and desire to secure by Letters Patentis.- v

The device, substantially as described, for preventing the breaking ofmoving or stationary parts of machinery.

ELIJAH S. PIERCE. Witnesses:

L. HAFELIN, Tnno. G. Enms.

